# Often asked: How To Compute An Aviation Glide Slope Using Excel?

## How do you calculate the slope of a glide angle?

The flight path intersects the ground at an angle “a” called the glide angle. If we know the distance flown and the altitude change, we can calculate the glide angle using trigonometry. The tangent (tan) of the glide angle (a) is equal to the change in height (h) divided by the distance flown (d).

## How do you calculate a 3 degree glide slope?

For a 3 degree glideslope, required rate of descent in feet per minute is approximately equal to ground speed in knots multiplied by 5.

## How is aircraft glide distance calculated?

Glide Ratio = Horizontal Distance divided by the Change in Altitude. Another way to think of this is to ask, how far did the glider travel forward for every foot it dropped in altitude? For example: You released your Shoebox Glider from atop a 10-foot high ladder.

## How do you calculate the degree of a slope?

Since degree of slope is equal to the tangent of the fraction rise/run, it can be calculated as the arctangent of rise/run. Figure 7.10. 2 A rise of 100 feet over a run of 100 feet yields a 45° slope angle. A rise of 50 feet over a run of 100 feet yields a 26.6° slope angle.

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## What is the 3 6 rule?

The 3 – 6 – 3 rule describes how bankers would supposedly give 3 % interest on their depositors’ accounts, lend the depositors money at 6 % interest, and then be playing golf by 3 p.m. In the 1950s, 1960s, and 1970s, a huge part of a bank’s business was lending out money at a higher interest rate than what it was paying out

## Why does a 3 degree glide slope?

Another reason for a three degree glideslop is that, with flaps extended & gear down, the engines have to be producing a reasonable amount of thrust to overcome the drag and thus are running at (say) 75% RPM. A steep or glide approach would result in them running at idle, at (say) 40% RPM.

## What is a 3 degree glide path?

The rule simply states that a conventional, 3 – degree glideslope (normally the optimum vertical profile to use during a landing approach) descends 300 feet per nautical mile. In other words, multiply your distance from touchdown by 300 feet to determine target altitudes while on final approach.

## What is the fastest way to calculate descent rate?

If you multiply your descent angle (1 degree) by your miles-per-minute, then add two zeros to the end (x 100), you’ll have your FPM descent rate. So in this example, if you’re flying at 120 knots, you’re traveling 2 miles-per-minute (MPM) (120/60=2).

## Does Weight Affect glide distance?

Since it is the lift over drag (L/D) ratio that determines the gliding range, weight will not affect it. The glide ratio is based only on the relationship of the aerodynamic forces acting on the aircraft. The only effect weight has is to vary the time the aircraft will glide for.

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## What is a good glide ratio?

Glide ratio This is especially of interest in the design and operation of high performance sailplanes, which can have glide ratios almost 60 to 1 (60 units of distance forward for each unit of descent) in the best cases, but with 30:1 being considered good performance for general recreational use.

## What is maximum glide ratio?

The best glide ratio or maximum glide ratio is simply the best ratio a glider can achieve. Best glide ratio is achieved at a specific airspeed, which varies depending on the glider type. One flies at best glide speed in order to maximize the distance covered.

## What is gliding angle?

: the angle between the plane of the horizon and the path of a glider or airplane especially: the least angle at which a glider or airplane will glide to earth in still air.

## What is the glide ratio of a 747?

 The glide ratio of a Boeing 747 is 17:1 meaning that for every 1,000ft of altitude lost, the Boeing 747 will travel 17,000ft.  The glide angle (γ) is related to the glide slope by tan(γ) and the glide ratio is calculated as the inverse of the glide slope, cot(γ).